根据条件计算降雨季节的开始时间

Question

我想实现这个规则，以在数据集中获得每年雨季的开始(根据Sivakumar(：雨季的开始对应于一个日期X，在这个日期，5月1日之后的连续3天内，降雨量将达到20毫米，没有超过7天的降雨。

因此，应该有3个条件：

1. X在5月1日之后
2. X之后的未来3天的总降雨量应为>=20毫米
3. X之后的第4天到第10天之间应该会下雨

这是一年的降雨量数据的字典形式。将其转换为数据帧以试用您的代码。

{'Date': {0: Timestamp('1931-01-01 00:00:00'),
1: Timestamp('1931-01-02 00:00:00'),
2: Timestamp('1931-01-03 00:00:00'),
3: Timestamp('1931-01-04 00:00:00'),
4: Timestamp('1931-01-05 00:00:00'),
5: Timestamp('1931-01-06 00:00:00'),
6: Timestamp('1931-01-07 00:00:00'),
7: Timestamp('1931-01-08 00:00:00'),
8: Timestamp('1931-01-09 00:00:00'),
9: Timestamp('1931-01-10 00:00:00'),
10: Timestamp('1931-01-11 00:00:00'),
11: Timestamp('1931-01-12 00:00:00'),
12: Timestamp('1931-01-13 00:00:00'),
13: Timestamp('1931-01-14 00:00:00'),
14: Timestamp('1931-01-15 00:00:00'),
15: Timestamp('1931-01-16 00:00:00'),
16: Timestamp('1931-01-17 00:00:00'),
17: Timestamp('1931-01-18 00:00:00'),
18: Timestamp('1931-01-19 00:00:00'),
19: Timestamp('1931-01-20 00:00:00'),
20: Timestamp('1931-01-21 00:00:00'),
21: Timestamp('1931-01-22 00:00:00'),
22: Timestamp('1931-01-23 00:00:00'),
23: Timestamp('1931-01-24 00:00:00'),
24: Timestamp('1931-01-25 00:00:00'),
25: Timestamp('1931-01-26 00:00:00'),
26: Timestamp('1931-01-27 00:00:00'),
27: Timestamp('1931-01-28 00:00:00'),
28: Timestamp('1931-01-29 00:00:00'),
29: Timestamp('1931-01-30 00:00:00'),
30: Timestamp('1931-01-31 00:00:00'),
31: Timestamp('1931-02-01 00:00:00'),
32: Timestamp('1931-02-02 00:00:00'),
33: Timestamp('1931-02-03 00:00:00'),
34: Timestamp('1931-02-04 00:00:00'),
35: Timestamp('1931-02-05 00:00:00'),
36: Timestamp('1931-02-06 00:00:00'),
37: Timestamp('1931-02-07 00:00:00'),
38: Timestamp('1931-02-08 00:00:00'),
39: Timestamp('1931-02-09 00:00:00'),
40: Timestamp('1931-02-10 00:00:00'),
41: Timestamp('1931-02-11 00:00:00'),
42: Timestamp('1931-02-12 00:00:00'),
43: Timestamp('1931-02-13 00:00:00'),
44: Timestamp('1931-02-14 00:00:00'),
45: Timestamp('1931-02-15 00:00:00'),
46: Timestamp('1931-02-16 00:00:00'),
47: Timestamp('1931-02-17 00:00:00'),
48: Timestamp('1931-02-18 00:00:00'),
49: Timestamp('1931-02-19 00:00:00'),
50: Timestamp('1931-02-20 00:00:00'),
51: Timestamp('1931-02-21 00:00:00'),
52: Timestamp('1931-02-22 00:00:00'),
53: Timestamp('1931-02-23 00:00:00'),
54: Timestamp('1931-02-24 00:00:00'),
55: Timestamp('1931-02-25 00:00:00'),
56: Timestamp('1931-02-26 00:00:00'),
57: Timestamp('1931-02-27 00:00:00'),
58: Timestamp('1931-02-28 00:00:00'),
59: Timestamp('1931-03-01 00:00:00'),
60: Timestamp('1931-03-02 00:00:00'),
61: Timestamp('1931-03-03 00:00:00'),
62: Timestamp('1931-03-04 00:00:00'),
63: Timestamp('1931-03-05 00:00:00'),
64: Timestamp('1931-03-06 00:00:00'),
65: Timestamp('1931-03-07 00:00:00'),
66: Timestamp('1931-03-08 00:00:00'),
67: Timestamp('1931-03-09 00:00:00'),
68: Timestamp('1931-03-10 00:00:00'),
69: Timestamp('1931-03-11 00:00:00'),
70: Timestamp('1931-03-12 00:00:00'),
71: Timestamp('1931-03-13 00:00:00'),
72: Timestamp('1931-03-14 00:00:00'),
73: Timestamp('1931-03-15 00:00:00'),
74: Timestamp('1931-03-16 00:00:00'),
75: Timestamp('1931-03-17 00:00:00'),
76: Timestamp('1931-03-18 00:00:00'),
77: Timestamp('1931-03-19 00:00:00'),
78: Timestamp('1931-03-20 00:00:00'),
79: Timestamp('1931-03-21 00:00:00'),
80: Timestamp('1931-03-22 00:00:00'),
81: Timestamp('1931-03-23 00:00:00'),
82: Timestamp('1931-03-24 00:00:00'),
83: Timestamp('1931-03-25 00:00:00'),
84: Timestamp('1931-03-26 00:00:00'),
85: Timestamp('1931-03-27 00:00:00'),
86: Timestamp('1931-03-28 00:00:00'),
87: Timestamp('1931-03-29 00:00:00'),
88: Timestamp('1931-03-30 00:00:00'),
89: Timestamp('1931-03-31 00:00:00'),
90: Timestamp('1931-04-01 00:00:00'),
91: Timestamp('1931-04-02 00:00:00'),
92: Timestamp('1931-04-03 00:00:00'),
93: Timestamp('1931-04-04 00:00:00'),
94: Timestamp('1931-04-05 00:00:00'),
95: Timestamp('1931-04-06 00:00:00'),
96: Timestamp('1931-04-07 00:00:00'),
97: Timestamp('1931-04-08 00:00:00'),
98: Timestamp('1931-04-09 00:00:00'),
99: Timestamp('1931-04-10 00:00:00'),
100: Timestamp('1931-04-11 00:00:00'),
101: Timestamp('1931-04-12 00:00:00'),
102: Timestamp('1931-04-13 00:00:00'),
103: Timestamp('1931-04-14 00:00:00'),
104: Timestamp('1931-04-15 00:00:00'),
105: Timestamp('1931-04-16 00:00:00'),
106: Timestamp('1931-04-17 00:00:00'),
107: Timestamp('1931-04-18 00:00:00'),
108: Timestamp('1931-04-19 00:00:00'),
109: Timestamp('1931-04-20 00:00:00'),
110: Timestamp('1931-04-21 00:00:00'),
111: Timestamp('1931-04-22 00:00:00'),
112: Timestamp('1931-04-23 00:00:00'),
113: Timestamp('1931-04-24 00:00:00'),
114: Timestamp('1931-04-25 00:00:00'),
115: Timestamp('1931-04-26 00:00:00'),
116: Timestamp('1931-04-27 00:00:00'),
117: Timestamp('1931-04-28 00:00:00'),
118: Timestamp('1931-04-29 00:00:00'),
119: Timestamp('1931-04-30 00:00:00'),
120: Timestamp('1931-05-01 00:00:00'),
121: Timestamp('1931-05-02 00:00:00'),
122: Timestamp('1931-05-03 00:00:00'),
123: Timestamp('1931-05-04 00:00:00'),
124: Timestamp('1931-05-05 00:00:00'),
125: Timestamp('1931-05-06 00:00:00'),
126: Timestamp('1931-05-07 00:00:00'),
127: Timestamp('1931-05-08 00:00:00'),
128: Timestamp('1931-05-09 00:00:00'),
129: Timestamp('1931-05-10 00:00:00'),
130: Timestamp('1931-05-11 00:00:00'),
131: Timestamp('1931-05-12 00:00:00'),
132: Timestamp('1931-05-13 00:00:00'),
133: Timestamp('1931-05-14 00:00:00'),
134: Timestamp('1931-05-15 00:00:00'),
135: Timestamp('1931-05-16 00:00:00'),
136: Timestamp('1931-05-17 00:00:00'),
137: Timestamp('1931-05-18 00:00:00'),
138: Timestamp('1931-05-19 00:00:00'),
139: Timestamp('1931-05-20 00:00:00'),
140: Timestamp('1931-05-21 00:00:00'),
141: Timestamp('1931-05-22 00:00:00'),
142: Timestamp('1931-05-23 00:00:00'),
143: Timestamp('1931-05-24 00:00:00'),
144: Timestamp('1931-05-25 00:00:00'),
145: Timestamp('1931-05-26 00:00:00'),
146: Timestamp('1931-05-27 00:00:00'),
147: Timestamp('1931-05-28 00:00:00'),
148: Timestamp('1931-05-29 00:00:00'),
149: Timestamp('1931-05-30 00:00:00'),
150: Timestamp('1931-05-31 00:00:00'),
151: Timestamp('1931-06-01 00:00:00'),
152: Timestamp('1931-06-02 00:00:00'),
153: Timestamp('1931-06-03 00:00:00'),
154: Timestamp('1931-06-04 00:00:00'),
155: Timestamp('1931-06-05 00:00:00'),
156: Timestamp('1931-06-06 00:00:00'),
157: Timestamp('1931-06-07 00:00:00'),
158: Timestamp('1931-06-08 00:00:00'),
159: Timestamp('1931-06-09 00:00:00'),
160: Timestamp('1931-06-10 00:00:00'),
161: Timestamp('1931-06-11 00:00:00'),
162: Timestamp('1931-06-12 00:00:00'),
163: Timestamp('1931-06-13 00:00:00'),
164: Timestamp('1931-06-14 00:00:00'),
165: Timestamp('1931-06-15 00:00:00'),
166: Timestamp('1931-06-16 00:00:00'),
167: Timestamp('1931-06-17 00:00:00'),
168: Timestamp('1931-06-18 00:00:00'),
169: Timestamp('1931-06-19 00:00:00'),
170: Timestamp('1931-06-20 00:00:00'),
171: Timestamp('1931-06-21 00:00:00'),
172: Timestamp('1931-06-22 00:00:00'),
173: Timestamp('1931-06-23 00:00:00'),
174: Timestamp('1931-06-24 00:00:00'),
175: Timestamp('1931-06-25 00:00:00'),
176: Timestamp('1931-06-26 00:00:00'),
177: Timestamp('1931-06-27 00:00:00'),
178: Timestamp('1931-06-28 00:00:00'),
179: Timestamp('1931-06-29 00:00:00'),
180: Timestamp('1931-06-30 00:00:00'),
181: Timestamp('1931-07-01 00:00:00'),
182: Timestamp('1931-07-02 00:00:00'),
183: Timestamp('1931-07-03 00:00:00'),
184: Timestamp('1931-07-04 00:00:00'),
185: Timestamp('1931-07-05 00:00:00'),
186: Timestamp('1931-07-06 00:00:00'),
187: Timestamp('1931-07-07 00:00:00'),
188: Timestamp('1931-07-08 00:00:00'),
189: Timestamp('1931-07-09 00:00:00'),
190: Timestamp('1931-07-10 00:00:00'),
191: Timestamp('1931-07-11 00:00:00'),
192: Timestamp('1931-07-12 00:00:00'),
193: Timestamp('1931-07-13 00:00:00'),
194: Timestamp('1931-07-14 00:00:00'),
195: Timestamp('1931-07-15 00:00:00'),
196: Timestamp('1931-07-16 00:00:00'),
197: Timestamp('1931-07-17 00:00:00'),
198: Timestamp('1931-07-18 00:00:00'),
199: Timestamp('1931-07-19 00:00:00'),
200: Timestamp('1931-07-20 00:00:00'),
201: Timestamp('1931-07-21 00:00:00'),
202: Timestamp('1931-07-22 00:00:00'),
203: Timestamp('1931-07-23 00:00:00'),
204: Timestamp('1931-07-24 00:00:00'),
205: Timestamp('1931-07-25 00:00:00'),
206: Timestamp('1931-07-26 00:00:00'),
207: Timestamp('1931-07-27 00:00:00'),
208: Timestamp('1931-07-28 00:00:00'),
209: Timestamp('1931-07-29 00:00:00'),
210: Timestamp('1931-07-30 00:00:00'),
211: Timestamp('1931-07-31 00:00:00'),
212: Timestamp('1931-08-01 00:00:00'),
213: Timestamp('1931-08-02 00:00:00'),
214: Timestamp('1931-08-03 00:00:00'),
215: Timestamp('1931-08-04 00:00:00'),
216: Timestamp('1931-08-05 00:00:00'),
217: Timestamp('1931-08-06 00:00:00'),
218: Timestamp('1931-08-07 00:00:00'),
219: Timestamp('1931-08-08 00:00:00'),
220: Timestamp('1931-08-09 00:00:00'),
221: Timestamp('1931-08-10 00:00:00'),
222: Timestamp('1931-08-11 00:00:00'),
223: Timestamp('1931-08-12 00:00:00'),
224: Timestamp('1931-08-13 00:00:00'),
225: Timestamp('1931-08-14 00:00:00'),
226: Timestamp('1931-08-15 00:00:00'),
227: Timestamp('1931-08-16 00:00:00'),
228: Timestamp('1931-08-17 00:00:00'),
229: Timestamp('1931-08-18 00:00:00'),
230: Timestamp('1931-08-19 00:00:00'),
231: Timestamp('1931-08-20 00:00:00'),
232: Timestamp('1931-08-21 00:00:00'),
233: Timestamp('1931-08-22 00:00:00'),
234: Timestamp('1931-08-23 00:00:00'),
235: Timestamp('1931-08-24 00:00:00'),
236: Timestamp('1931-08-25 00:00:00'),
237: Timestamp('1931-08-26 00:00:00'),
238: Timestamp('1931-08-27 00:00:00'),
239: Timestamp('1931-08-28 00:00:00'),
240: Timestamp('1931-08-29 00:00:00'),
241: Timestamp('1931-08-30 00:00:00'),
242: Timestamp('1931-08-31 00:00:00'),
243: Timestamp('1931-09-01 00:00:00'),
244: Timestamp('1931-09-02 00:00:00'),
245: Timestamp('1931-09-03 00:00:00'),
246: Timestamp('1931-09-04 00:00:00'),
247: Timestamp('1931-09-05 00:00:00'),
248: Timestamp('1931-09-06 00:00:00'),
249: Timestamp('1931-09-07 00:00:00'),
250: Timestamp('1931-09-08 00:00:00'),
251: Timestamp('1931-09-09 00:00:00'),
252: Timestamp('1931-09-10 00:00:00'),
253: Timestamp('1931-09-11 00:00:00'),
254: Timestamp('1931-09-12 00:00:00'),
255: Timestamp('1931-09-13 00:00:00'),
256: Timestamp('1931-09-14 00:00:00'),
257: Timestamp('1931-09-15 00:00:00'),
258: Timestamp('1931-09-16 00:00:00'),
259: Timestamp('1931-09-17 00:00:00'),
260: Timestamp('1931-09-18 00:00:00'),
261: Timestamp('1931-09-19 00:00:00'),
262: Timestamp('1931-09-20 00:00:00'),
263: Timestamp('1931-09-21 00:00:00'),
264: Timestamp('1931-09-22 00:00:00'),
265: Timestamp('1931-09-23 00:00:00'),
266: Timestamp('1931-09-24 00:00:00'),
267: Timestamp('1931-09-25 00:00:00'),
268: Timestamp('1931-09-26 00:00:00'),
269: Timestamp('1931-09-27 00:00:00'),
270: Timestamp('1931-09-28 00:00:00'),
271: Timestamp('1931-09-29 00:00:00'),
272: Timestamp('1931-09-30 00:00:00'),
273: Timestamp('1931-10-01 00:00:00'),
274: Timestamp('1931-10-02 00:00:00'),
275: Timestamp('1931-10-03 00:00:00'),
276: Timestamp('1931-10-04 00:00:00'),
277: Timestamp('1931-10-05 00:00:00'),
278: Timestamp('1931-10-06 00:00:00'),
279: Timestamp('1931-10-07 00:00:00'),
280: Timestamp('1931-10-08 00:00:00'),
281: Timestamp('1931-10-09 00:00:00'),
282: Timestamp('1931-10-10 00:00:00'),
283: Timestamp('1931-10-11 00:00:00'),
284: Timestamp('1931-10-12 00:00:00'),
285: Timestamp('1931-10-13 00:00:00'),
286: Timestamp('1931-10-14 00:00:00'),
287: Timestamp('1931-10-15 00:00:00'),
288: Timestamp('1931-10-16 00:00:00'),
289: Timestamp('1931-10-17 00:00:00'),
290: Timestamp('1931-10-18 00:00:00'),
291: Timestamp('1931-10-19 00:00:00'),
292: Timestamp('1931-10-20 00:00:00'),
293: Timestamp('1931-10-21 00:00:00'),
294: Timestamp('1931-10-22 00:00:00'),
295: Timestamp('1931-10-23 00:00:00'),
296: Timestamp('1931-10-24 00:00:00'),
297: Timestamp('1931-10-25 00:00:00'),
298: Timestamp('1931-10-26 00:00:00'),
299: Timestamp('1931-10-27 00:00:00'),
300: Timestamp('1931-10-28 00:00:00'),
301: Timestamp('1931-10-29 00:00:00'),
302: Timestamp('1931-10-30 00:00:00'),
303: Timestamp('1931-10-31 00:00:00'),
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362: Timestamp('1931-12-29 00:00:00'),
363: Timestamp('1931-12-30 00:00:00'),
364: Timestamp('1931-12-31 00:00:00')},
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124: 0.0,
125: 0.0,
126: 0.0,
127: 0.0,
128: 0.0,
129: 0.0,
130: 0.0,
131: 0.0,
132: 0.0,
133: 0.0,
134: 0.0,
135: 0.0,
136: 11.4,
137: 0.0,
138: 0.0,
139: 0.0,
140: 6.9,
141: 0.0,
142: 23.4,
143: 0.0,
144: 0.0,
145: 0.0,
146: 0.0,
147: 0.0,
148: 0.0,
149: 0.0,
150: 0.0,
151: 0.0,
152: 0.0,
153: 0.0,
154: 0.0,
155: 0.0,
156: 0.0,
157: 0.0,
158: 0.0,
159: 0.0,
160: 0.0,
161: 7.7,
162: 26.2,
163: 0.0,
164: 63.5,
165: 0.0,
166: 7.7,
167: 27.6,
168: 0.0,
169: 0.0,
170: 0.0,
171: 28.6,
172: 0.0,
173: 50.5,
174: 0.0,
175: 0.0,
176: 0.0,
177: 0.0,
178: 0.0,
179: 0.0,
180: 0.0,
181: 0.0,
182: 7.3,
183: 35.4,
184: 19.0,
185: 0.0,
186: 0.0,
187: 0.0,
188: 0.0,
189: 74.0,
190: 0.0,
191: 0.8,
192: 5.3,
193: 0.0,
194: 0.0,
195: 0.0,
196: 0.0,
197: 3.8,
198: 13.4,
199: 2.8,
200: 36.3,
201: 0.0,
202: 53.0,
203: 36.9,
204: 11.0,
205: 0.0,
206: 8.7,
207: 0.0,
208: 78.7,
209: 0.0,
210: 4.0,
211: 0.0,
212: 10.6,
213: 0.0,
214: 0.0,
215: 10.7,
216: 0.0,
217: 0.0,
218: 0.0,
219: 0.0,
220: 0.0,
221: 45.0,
222: 0.0,
223: 0.0,
224: 0.0,
225: 0.0,
226: 12.2,
227: 0.0,
228: 0.0,
229: 0.0,
230: 126.0,
231: 0.0,
232: 0.0,
233: 0.0,
234: 0.0,
235: 0.0,
236: 0.0,
237: 0.0,
238: 0.0,
239: 0.0,
240: 42.3,
241: 0.0,
242: 38.0,
243: 0.0,
244: 0.0,
245: 0.0,
246: 16.9,
247: 0.0,
248: 40.0,
249: 6.0,
250: 0.0,
251: 39.5,
252: 12.0,
253: 0.0,
254: 70.0,
255: 11.0,
256: 62.0,
257: 0.0,
258: 54.0,
259: 43.0,
260: 0.0,
261: 0.0,
262: 14.0,
263: 43.3,
264: 0.0,
265: 33.3,
266: 32.0,
267: 0.0,
268: 0.0,
269: 0.0,
270: 0.0,
271: 60.0,
272: 12.6,
273: 0.0,
274: 0.0,
275: 0.0,
276: 5.2,
277: 0.0,
278: 3.6,
279: 0.0,
280: 0.0,
281: 0.0,
282: 0.0,
283: 0.0,
284: 0.0,
285: 0.0,
286: 0.0,
287: 0.0,
288: 0.0,
289: 0.0,
290: 4.7,
291: 0.0,
292: 0.0,
293: 0.0,
294: 0.0,
295: 0.0,
296: 0.0,
297: 0.0,
298: 0.0,
299: 0.0,
300: 0.0,
301: 0.0,
302: 0.0,
303: 0.0,
304: 0.0,
305: 0.0,
306: 0.0,
307: 0.0,
308: 0.0,
309: 0.0,
310: 0.0,
311: 0.0,
312: 0.0,
313: 0.0,
314: 0.0,
315: 0.0,
316: 0.0,
317: 0.0,
318: 0.0,
319: 0.0,
320: 0.0,
321: 0.0,
322: 0.0,
323: 0.0,
324: 0.0,
325: 0.0,
326: 0.0,
327: 0.0,
328: 0.0,
329: 0.0,
330: 0.0,
331: 0.0,
332: 0.0,
333: 0.0,
334: 0.0,
335: 0.0,
336: 0.0,
337: 0.0,
338: 0.0,
339: 0.0,
340: 0.0,
341: 0.0,
342: 0.0,
343: 0.0,
344: 0.0,
345: 0.0,
346: 0.0,
347: 0.0,
348: 0.0,
349: 0.0,
350: 0.0,
351: 0.0,
352: 0.0,
353: 0.0,
354: 0.0,
355: 0.0,
356: 0.0,
357: 0.0,
358: 0.0,
359: 0.0,
360: 0.0,
361: 0.0,
362: 0.0,
363: 0.0,
364: 0.0}}

Answer 1

在您的完整数据上尝试：

for year, df in inter_Bafoulabe.groupby(inter_Bafoulabe["Date"].dt.year):
m1 = df['Date'].dt.month >= 5
m2 = df['Rain'].shift(1).rolling(3).sum().shift(-4) >= 20
m3 = df['Rain'].shift(3).rolling(7).sum().shift(-9) - df['Rain'].rolling(3).sum().shift(-2) > 0
day = df.loc[m1 & m2 & m3, 'Date'].iloc[0].strftime('%Y-%m-%d') if not df[m1 & m2 & m3].empty else 'Day not found'
print(f"{year}: {day}")